Learn all about your body's most important muscle: your heart! This simple diagram is a great way to introduce your little biologist to his heart.

How does blood flow through the heart? This worksheet prompts kids to map how blood is pumped through this sophisticated organ.

Children learn about the food cycle in a rain forest as they color in a scene of snakes, butterflies, leopards, and other forest-dwelling creatures.

Learn more about the skin (and the science behind pimples -- ew!) in this printable life science diagram.

Find out more about single-cell organisms with this coloring page and diagram.

What happens to our food after we swallow it? Chomp on some body science with this diagram of the digestive system.

Read up on the digestive system with this page, which follows your food from start to finish.

There's not much in the animal kingdom more interesting than tentacles with suckers! Learn about octopus anatomy with this worksheet.

Did you know our sense of smell is also called "olfactory"? Learn about the structure and function of the nose with this human anatomy sheet.

Record your notes as you learn about the cell cycle with this one-page template!

Students learn about population dynamics through the context of fox and rabbit populations in a forest ecosystem.

Learn more about the animals in the swamp food chain, and find out how each living thing in a swamp ecosystem needs another to survive.

Use clues to fill in the boxes in this crossword puzzle, and learn more about freshwater fish along the way.

Got a gardening guru on your hands? Give them a fun challenge with this fill-in-the-blanks quiz about the parts of a seed!

Learn more about the mysterious brain and how it works with this brain anatomy worksheet.

There are a lot of structures that make up a new plant, called a seedling. Your child will learn what they're called with this life science word search.

Learn about your sense of touch with this Awesome Anatomy page on the nervous system.

Learn about the integumentary system, which is really just a fancy phrase for "skin", in this worksheet.

Ever wonder how the human body functions? Enjoy this great info sheet all about the human heart, one of our most important organs.

Kids love squids! This simple squid diagram will help your 5th grader memorize the squid anatomy.

Students compare structures in the bodies of different organisms in order to draw conclusions about evolutionary relationships in this life science worksheet!

Did you know that invertebrates don't have backbones? Find out some different types of invertebrates with the clues in this crossword puzzle.

Humans have 32 teeth, including wisdom teeth, and this diagram has the names of all the other 28.

Learn more about the bones in your body and just how important they are with this reading sheet and diagram, all in one.

Learn about the many different biomes the Earth is home to in this life science worksheet, which holds the answers to some simple life science questions.

Review the different body parts with a fun crossword! This is a great way for your little doctor-in-training to review the basic organs and their functions.